FFM-10963 Metrics fix: cast target attribute values to string (#106)

Author: erdirowlands

Diff for: examples/getting_started/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@harnessio/ff-nodejs-server-sdk",
-  "version": "1.6.0",
+  "version": "1.6.1",
   "description": "Feature flags SDK for NodeJS environments",
   "main": "dist/cjs/index.js",
   "module": "dist/esm/index.mjs",
@@ -60,7 +60,7 @@
     "url": "https://github.com/harness/ff-nodejs-server-sdk"
   },
   "dependencies": {
-    "axios": "^1.6.4",
+    "axios": "^1.6.8",
     "axios-retry": "^3.9.1",
     "jwt-decode": "^3.1.2",
     "keyv": "^4.5.4",

Diff for: package-lock.json

@@ -113,9 +113,16 @@ export const MetricsProcessor = (
         let targetAttributes: KeyValue[] = [];
         if (event.target.attributes) {
           targetAttributes = Object.entries(event.target.attributes).map(
-            ([key, value]) => ({ key, value: value as string }),
+            ([key, value]) => {
+              const stringValue =
+                value === null || value === undefined
+                  ? ''
+                  : valueToString(value);
+              return { key, value: stringValue };
+            },
           );
         }
+
         let targetName = event.target.identifier;
         if (event.target.name) {
           targetName = event.target.name;
@@ -218,6 +225,10 @@ export const MetricsProcessor = (
     eventBus.emit(MetricEvent.READY);
   };
 
+  const valueToString = (value: any): string => {
+    return typeof value === 'object' && !Array.isArray(value) ? JSON.stringify(value) : String(value)
+  };
+
   const close = (): void => {
     log.info('Closing MetricsProcessor');
     clearInterval(syncInterval);

Diff for: package.json

@@ -1 +1 @@
-export const VERSION = '1.6.0';
+export const VERSION = '1.6.1';